Variable warp tensioning means



A. LANZ VARIABLE WARP TENSIONING MEANS 5 Sheets-Sheet 1 Filed June 29, 1945 7 Feb. I, 1949. LANZ 2,460,512

VARIABLE WARP TENSIONING MEANS Filed June 29, 1945 5-SheetsSheet 2 A. LANZ VARIABLE WARP TENSIONING MEANS Feb. 1, 1949.

3 Sheets-Sheet 3 Filed June 29, 1945 JNVEJYTOR:

Patented Feb. 1, 1949 PATENT OFFICE VARIABLE WARP TENSIONING MEANS Adolf Lanz, Wettingen, S

Baumwoll-Spinnerei & -Weberei Wettingen, Wettingen, Switzerland Application June29, 1945, Serial No. 602,205

. In Switzerland June 26, 1944 2 Claims. (01. 139-24) ing to eflect a more or less pronounced wavy form of the weft wherein the wavy portionsmay be of uniform or non-uniform configuration. The oscillatory member is preferably disposed between the upper warp beam that carries all of the warp threads and a lower beam which serves solely for guiding the threads deflected out of the warp,

said threads passing separately from the warp beam to the upper warp beam, so that operative conditions suitable for producing woven effects can remain unchanged from full to empt beam; an advantage accruing from the arrangement being that the weaving zone remains unencumbered by the supplementary means used, and another advantage being that the supplementary arrangement. can be applied without difficulty to already existing modern looms, for example,

those provided with automatic warp thread stop devices. I

In the arrangement according to the invention, the operation of the oscillatory member is effected by a shifting, endless operating means which is positively connected in operative relation with another operating member that serves to control the weaving operation.

The chief advantage is that when a suitably long, endless operating means is used, it makes for appreciably increasing the number of patterns that can be produced, in contrast, forexample, to the use of a ratchet and pawl arrangement, Due to the positive operative connection of the shifting, endless operating means with another operating arrangement that controls the weaving operation, any adjustmentof said second operating arrangement will also simultaneously adjust the shifting endless operating means so that the latter will remain adjusted for the particular operation under progress in the loom. The. shifting endless operating means, for example,v a chain, is preferably provided with removable stop members for controlling the operation of the oscillatory member so that by changing the number of stop members it is possible to control the operation of the oscillatory member accordingly, that is, to vary the same.

An embodiment of the invention is shown in witzerland, assignor to 2 the drawing, partly in diagrammatic form. Fig. 1 serves to explain the weaving procedure in its. fundamental aspects andshows the parts necessary for the purpose, in vertical section; I Fig. 2 is an axial section of the operating device, provided with the operating chain and intended for operating the oscillatory member;

Fig. 3 is a vertical section on line I1'IIII of Fig. 2;

Fig. 4 is a top view corresponding to Fig. 2; Fig. 5 shows, on enlarged scale, a partial section along lineV-V of Fig.4 but consideredas turned about at right angles to the latter figure; Figs. 6, '7 and 8 each depict. a different examplification of the combination of the control device with a loom, and

Figs. 9 and 10 serve for explaining two differ ent samples of goodshaving beenefi'ected by the method according to the present invention.

In Fig. 1, the numeral l designates a shaft which is mounted at both ends in bearingsthat are stationarily arranged on the frame of the loom. A round rod or rail 2 extends parallel with the shaft I at a certain distance apart from this shaft and has its ends ,fixed to the shaft l by means of connecting arms -3 (see also Fig. 8). By rocking the shaft I back and forth about its axis the round rod 2 is correspondingly swung about said axis, thereby to act as a rocking rod. The warp beam is designated by 4, the usual back rest or rail by 5, an additional back rest or rail by G and a thread guiding roll which is situated near to the warp beam by l. I

From the warp a'thread groups b are divided or leased off as indicated in chain dotted lines in'Fig. 1, said thread groups passing away from the warp beam 4 across the roll I to the rocking rod 2 and the back rest 5. On the oposite side of the rocking rod 2 thread groups 0 which also had been leased oi the warp a bear against said rod," as indicated in chain-dotted lines in Fig. 1, said thread groups passing away from the warp beam across the roll I, the rocking bar 2', and the back rest 5; The thread groups I) and c are, therefore, diverted from the normal course of the warp threads a in difierent ways between the' warp beam 4 and the weaving position, the warp threads passing away from the warp beam 4 across the additional back rest 6 and the usual back rest 5, as indicated in Fig. 1. v

The rocking movement of the rocker bar Z is initiated by the endless control chain 8 which provided forthis purpose with a limitednumber of stops '9 which are in the form of round discs fashion that the links can be loosely hooked to each other. A chain link I I of this kind is hooked to the stirrup it mentioned above which as :well as the stop 9 replaces a normal chain link 'I I. 7

As will be seen from Fig. 5,, the control 'c'h'ain'B, of which in this figure only a short piece is shown, passes round a chain wheel I3 which is provided at two diametrically opposed circumferential points with concave recesses M which serve the purpose of receiving individual stops 9 of the control chain 8. The chain wheel I3 is loosely mounted on a fixed node I 5. .Into a circumferential groove in the chain wheel I3 project two relatively opposed clutch shifting studs i6 (Figs. 2, 3 and 4) which constitute clutch shifting members and are held by the two arms of afork H which are connected. to a swivelling member is. This member .13 is carried by means of a bolt I9 by a leg of aconnecting angle the other leg of which is secured to an angular holder 22 by means ofca connecting screw 2 L The bolt I 9 and the connecting screw 2| are each adjustably arranged in a separate slot in the angle Zil and the holder 22 respectively.

As shown in .Fig. 2, the holder 22 receives by means of a depending arm the axle I5 carrying the chain wheel [3. This axle projects through a. slot- 23 in a support 24. A screw connection serves for adjusting the axle I5 in said slot 23 as to height. The depending arm'of the holder 22 engages with a tension spring 25 whichfis connected with a side arm on the swivelling member l8 (Fig. 3). This member carries a roller 2'? whichserves for cooperating with thestops Son the control chain ii. The tension spring '26 tends to maintain coupling'engagement by means of a clutch .element which'is provided atone end of the hub of chain wheel I3 "(Fig 4) and a mating clutch element 28 which is mounted on the hub of a control lever 29 and is secured against displacement relative to said lever by "means of a screw (Fig. 2). I V

The clutch element 28 is provided on the engaging end thereof with a cross groove in which The described control device is secured to the top of the side shield of the weaving loom by means of the support 24 and a screw 40, as shown in Fig. 6. The connecting rod 39 is connected with an arm 4| which is fastened to the shaft I carrying the rocker bar 2, and by means of a screw connection'fidz "the rod 39 is adjustable along a longitudinal slot in the arm M. The endless control chain 8 in addition to passing round the precedingly mentioned chain wheel I3 passes also-overch'ain'wheels 43, t4 anddfi (Fig. 6) each of which is likewise provided with two circumferentialrre'cesses which serve for receiving stops The chain '9- provided. on, the .contro1 chain 8. wheels 63 to are arranged on the loom frame, the chain wheel 4'4 being specifically mounted on the driving shaft #36 of the weft supply means V consequently'also the control lever 23 is rotated by means of the chain wheel which 'is being actuated by the chain 8; By aotion'of the control lever 2gthe arm ll is accordingly moved by means of the connectingro'd 'iiil and this *move- 7 ment is transmitted. to the rooieer'bar '2 via the shaft i so that the warp thread groups being passed over said bar are correspondingly influenced. V

As soon as a stop 9 on the control chain S'then passes round the chain wheel I'3'this stop begins to cooperate with the roller "2? being carried by the swivellin member l8, whereby such a pivotal displacement of the swivelling member 58 against the effort of the tension spring 26 takes place that the chain wheel I3 is disconnected from engagement with the 'clutchelement 28 by means of the shifting studs l6. At this time the control lever 29 is in a position "in which the auxiliary lever 32 carried thereby has been rnoved into e'n-' gagemen-t with a kerf in the locking disc 38' by means of the roller 33 associated with said auxilithe control lever 29 which is rotatably mounted .adaptedlto receive the roller 33, when the control lever 29 is correspondingly positioned, so. as to have a locking effect on the rocker when "at rest.

The auxiliary lever 32- is maintained engage.- ment with the circumference of the locking disc 34 by means of a tension spring 35; The spring 35 is connected with a bolt 36 which is adjustable along thelength .of a longitudinal slot 38 in the control lever 29 by meansof a screw connection 7 31. As shown in Fig-2, areduced portion which isprovided-on the projecting-endcf the bolt 35 serves as a support for a connecting rod 39., Y

ary lever. By this means the control lever 29 remains locked in position 'for the time being.

The chain wheel i3 then keeps on rotating for half a turn free from engagement with the clutch element 28 until, due to corresponding axial displacement of the chain wheel "I3 by action of the spring loaded swivelling member i8, the dogs on the chain wheel I3 enter between-the dogs on the clutch element 28. Thereupon the clutch element 28 is turned along with the chain wheel is again and the control lever 29 is further pivotally displaced until by means or another stop 9 on the control chain 8 the chain wheel i3 is discon neoted anew in' the above-described manner.

If in the control chain 3 two orrmore stops 9 follow each other only at. a distance apart equalling that between two consecutive 'circurrn ferential recesses l 4 in the control chain wheel I3 the result is obtained that'the, chain wheel i3. after havin beendisconnected by means of a stop 9 from. the clutch' element 28, remains disconnected on havingcontinued to rotate through half a turn, for the reason that another stop 9 on the control chain 3 then influences. that is, retains the swivelling member I8 in a correspondingly pivotally displaced position.

Therefore, by'accordi'n'gly choosing the relarocker bar 2 is kept from moving. The duration of inoperation of the rocker bar 2 depends upon the relative arrangement .of the stops 9 on the control chain 8 so that the'time of inoperation canbe selected to be shorter or lon er dependent upon the patterning effect to be obtained in the weave. By this means moreor less pronounced patterns can be effected, as required.

If forany purpose of manufacture, for example, if weft thread breakage arises'or if faulty weaving must be eliminated from the weave so that the person attending to the .loom must turn the handwheel 47, which is arranged on the driving shaft 46 (Fig. 6) ,for readjusting the weft supply control means, the control chain 8 is adjusted in the same direction and in a proportional amount.

By this means the relative adjustment of the chain wheel l3 and of those parts, the movement of which depends on said wheel, to the driving shaft 46 and thus to the weft supply control means is maintained. The readjustment of the weft supply control means thus has the eifect that without any further provisions the rocker bar 2 is correspondingly adjusted with the result that the adjustment of this bar to the picking of the weft remain unchanged.

In Fig. '7 the control device being influenced by the control chain 8 is shown to be situated within the embrace, that is, immediately laterally of the side shield of the loom illustrated, which operates by means of several shuttles, that is, by changing of color, and thus represents a multiple box loom. Accordingly, the chain wheel 44 of the control chain 8 is mounted on a shaft 48 which is positively operatively connected with a chain wheel 50 by means of a train of interchangeable spur gears 49. Round the chain wheel 56 passes an endless chain 5i which further passes round a chain wheel 52 which is fixed to a shaft 53 which further carries a ratchet wheel 54 which is secured to said shaft and cooperates with a pawl 55 which is rotatably mounted on a bolt 56 being fastened on a staticnary support 51. The shaft 53 constitutes the so-called shuttle changing cylinder, that is, the color changing cylinder and is arranged on a rockable lever 58, in conventional manner, and rotatably mounted by means of a bolt 59 on the loom side shield illustrated and actuated by a cam drive (not shown).

The shaft 53 is advanced by one tooth division in time with each rocking movement of the rocking lever 56, thereby to rotate by a quarter of a turn for accordingly advancing the pattern chain which controls the shuttle changing, that is, the color changing of the weft thread. Commensurate with the advancing of the shaft 53 the feeding, that is, the movement of the control chain 8 and thus that of the control device of the rocker bar 2 is positively effected via the chain 5| and the train of gears 49.

On the shaft 53 is fixed a handwheel (not shown) which serves for appropriately adjusting the shaft 53 and thus the pattern card. In adjusting the shaft 53 the control chain 8 is positively adjusted at the same time as to direction as well as proportionately to this adjusting movement. By interchanging of gears in the iii) rocker bar 2 by which means the patterning of I the weave is accordingly eifected.

In Fig. 8 the arm 4| being fastened to the shaft l is connected to the control lever 29 by means of a connecting rod 60. This connecting rod 60 is adjustable as to length and terminates at both of its ends'in spherical heads for engagement with spherical sockets El and 62 respectively, the former being adjustable by means of a screw connection 63 in the longitudinal slot in the arm 4! and the latter in the longitudinal slot in the control lever 29 by means of a screw connection also. Positively operatively connected. with the shaft d8 carrying the chain wheel 4 for the control chain 8 is a chain Wheel 55 by means of a train of interchangeable gears 64.

Round this chain wheel E5 passes an endless chain 55 which further passes round a chain wheel 6'! which is firmly mounted on a shaft 68. This shaft 58 is constructed in a manner similar to the build of a card cylinder round which passes an endless patterning card 69 in a manner similarto that of a patterning strip. The loom is assumed to be provided with a dobby To to which is correlated the abovesaid card cylinder with which is connected the control contrivance for the shuttle changing means, that is, the color changing means. The card cylinder can be adjusted by the person attending to the loom by means of a hand-wheel which is carried by the shaft 68 (not shown). At the 4 same time the control contrivance for the shuttle changing means, that is, the color changing means as well as the control device for the shaft i, that is, the rocker bar are positively adjusted to the required extent by the relevant provisions as made. Consequently the card cylinders, the control device for the weft changing means and that for the rocker bar 2 remain properly coordinated with each other for joint operation.

Instead of a single rocker for thread groups having been diverted from the normal path of travel several rockers may be employed. In certain circumstances the control chain 8 may be replaced by any suitable endless traveling control member.

The Woven piece shown in Fig. 9 is provided with a one-colored, for example, a green ground A'Which is provided by influence ofthe abovesaid rocker bar with wavy weft threads as well as with a strip 13 of a different, for example, a grey color which has the form of a uniform wave line. Obviously a greater or lesser number of such strips B may be provided in the woven piece, which may be uniformly or nonuniformly spaced apart and may extend parallel or be staggered relative to each other in regard to the wave elevations and the depressions between waves.

The woven piece shown in Fig. 10 displays, on a one-colored, for example, a red ground A which contains wavily entered weft threads, partlycolored strips C and D which are each provided with a median part E that may, for example, be formed of brown threads and bordered on both of its sides with a marginal portion which is, for example, formed of grey threads. The two strips C and D are provided with occasional straight portions and follow such a course that the straight portions of the two strips alternately approach on the reoede from each other. This 7V striped constellation may be repeated in the :woven piece inzthe manner of a-repeat of pattern.

Lclaim;

1. A control varran gement for'looms for producing woven effects comprising, ;:an oscillatory member overwhich threads d flected out of the warp are conducted, a chain provided with abutment stops constituting members of :the chain I and sSfiI'ViIlg for controllin the oscillatory member, said chain being in operative ;relation with '-.another operating @device which :controls t'he :weaving operation, and Ya clutch 4,01 con- :trolling the "movement :Of -'the oscillatory :memb'e1,:one part of said'clutch being formed as a sprocket-wheel over which the chain: passes.

25 mm arrangement on Plooms "for producing woven efiects, said looms having a back rest over which the warp threads pass and a guiding roll over which a divided out part of the ".warp threads pass, an oscillating rail over Which'the 'divided out Warp threads pass, an endless t'ravelling chain'having stop members connected thereto, a clutch having two engaging parts, one of which parts is controlled by said stop mem- 'bers todisengagethe clutch for controllingthe movement of said oscillating rail, a :fu-rther operating arrangement :for controlling the a l/ ear.- ing, said oscillating railvopfi'rating' me'ans'l' the otheroperating arrangement 'beirig positively connected in movement imparting relation. 

